Unlock deeper multi-jurisdiction research
Full sub-pages, saves, and alerts are available on paid plans.
Weather & Climate
Granite County, Montana, United States
Overview
Climate data and monthly weather averages for Granite County.
Key Metrics
Annual Avg
4.1°C
Summer Avg
15.7°C
Winter Avg
-6.6°C
Record High
39.2°C
Record Low
-38°C
Annual Precipitation
663.7 mm
Avg Humidity
75%
Summer Humidity
59%
Winter Humidity
93%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 9.2° | -6.6° | -33° | 52.4 | 95% | 47 | 23.1 |
| Feb | 9.9° | -6.1° | -38° | 54 | 91% | 70 | 25.5 |
| Mar | 20.4° | -1.6° | -31.5° | 58.3 | 83% | 114 | 23.8 |
| Apr | 23.4° | 2.1° | -16.7° | 63 | 76% | 145 | 24.4 |
| May | 28.7° | 7.5° | -13.8° | 77.5 | 72% | 177 | 24.7 |
| Jun | 34.7° | 11.9° | -3.7° | 84 | 70% | 195 | 18.1 |
| Jul | 39.2° | 18° | 0.8° | 31.3 | 56% | 225 | 19.2 |
| Aug | 37.3° | 17.2° | -0.5° | 37.8 | 51% | 187 | 19.7 |
| Sep | 32.2° | 11.6° | -6.5° | 41.7 | 57% | 134 | 20.9 |
| Oct | 28.3° | 4° | -22.7° | 50.5 | 70% | 86 | 24.2 |
| Nov | 18.2° | -2.2° | -25.7° | 55.2 | 83% | 49 | 27.2 |
| Dec | 6.9° | -7° | -36.1° | 58 | 93% | 36 | 23.8 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
Subscribe to unlock the full sub-page depth for additional jurisdictions.
You can keep discovering Oyster publicly, but full multi-jurisdiction depth, tracking, alerts, and exports are part of paid access.